an improvement of yields and shorter reaction times compared with neutral conditions as previously described. The resulting products represent potentially useful substrates for the synthesis of 3-deoxy-2-keto-ulosonic acid derivatives. Thus, diazo derivatives from d-mannose were transformed into Ko and 3-epimer Ko derivatives in a straightforward process by reaction with mCPBA.
据报道2-
重氮乙酸乙酯与醛糖和
半缩醛形式的
单糖衍
生物的反应。与先前所述的中性条件相比,
二乙基锌的使用导致产率的提高和较短的反应时间。所得产物代表用于合成3-脱氧-2-酮-乌
磺酸衍
生物的潜在有用的底物。因此,通过与m CPBA反应的直接过程,将来自d-
甘露糖的重氮衍
生物转化为Ko和3-epimer Ko衍
生物。